Hi robert,
Sounds as though the kiln isn't hot enough. Once you've lit the fire with the help of the leaves over to the right, keep it going with a few scoops of coal from the box in front. If the flames are high and bright, immediately place the figurine on the fire, and the baking process will literally take a few seconds - the figurine will turn black when it's ready.
You might need to keep building the fire to keep it hot.
